RFR: JDK-8067479: verify-modules fails in bootcycle build

[Erik Joelsson]

Hello,

Please review this patch which fixes the verify-modules target when 
running bootcycle build, and also reenables verify-modules when running 
"make images".

There were two problems:

* The bootcycle build configuration was broken so that both the normal 
and the bootcycle build used the same HOTSPOT_DIST directory. The 
consequence of this was that verify-modules worked when run on its own, 
but not if bootcycle-images had been run before. This is fixed in 
bootcycle-spec.gmk.in.

* Since javac in JDK 9 no longer emits classes for implicitly compiled 
sources, certain classes in sa-jdi.jar were not compiled during the 
bootcycle build. I fixed this by adding the missing classes to sa.files. 
Not having the classes there might have been intentional (in at least 
some cases), but since they were compiled anyway, I felt it safer to 
just add them to the list to fix this issue. If these classes shouldn't 
be included, then they need to be properly removed in a followup fix.

Bug: https://bugs.openjdk.java.net/browse/JDK-8067479
Webrev: http://cr.openjdk.java.net/~erikj/8067479/webrev.01/

Since this is changing hotspot, I assume it will need to go in through a 
hotspot forest. Which one?

/Erik